I don't know the exact "cost", which may be too complicated to calculate it, including car,maintenance,gas,insurrance, even tickets....0 v7 i Q" Y7 J W9 N. L
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For me, I think car-pool is just to share part of gas "cost" and have some fun on road..... 4 a) B1 E0 s! t" l! s/ l7 x $ f# [1 ~* |3 s8 Y( f) iI usally charge passager 30 bucks for a trip.